From a8f21a94b093171c084678a03cbe7403f9b23452 Mon Sep 17 00:00:00 2001
From: Alex Ning <chineseperson5@gmail.com>
Date: Thu, 14 Oct 2021 20:57:22 +0800
Subject: New option: Pinch to Zoom Video.

---
 .../activities/ViewImageOrGifActivity.java         |  4 +++-
 .../activities/ViewVideoActivity.java              | 25 ++++++++++++++++++++++
 .../utils/SharedPreferencesUtils.java              |  1 +
 3 files changed, 29 insertions(+), 1 deletion(-)

(limited to 'app/src/main/java')

diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewImageOrGifActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewImageOrGifActivity.java
index d07e8c69..e5d5f72b 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewImageOrGifActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewImageOrGifActivity.java
@@ -292,7 +292,9 @@ public class ViewImageOrGifActivity extends AppCompatActivity implements SetAsWa
         // Fixes #383
         // Not having a background will cause visual glitches on some devices.
         FrameLayout slidablePanel = findViewById(R.id.slidable_panel);
-        slidablePanel.setBackgroundColor(getResources().getColor(android.R.color.black));
+        if (slidablePanel != null) {
+            slidablePanel.setBackgroundColor(getResources().getColor(android.R.color.black));
+        }
     }
 
     private void loadImage() {
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewVideoActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewVideoActivity.java
index 5a473d29..09d9850b 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewVideoActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewVideoActivity.java
@@ -7,6 +7,7 @@ import android.content.pm.ActivityInfo;
 import android.content.pm.PackageManager;
 import android.content.res.Configuration;
 import android.content.res.Resources;
+import android.graphics.Matrix;
 import android.graphics.drawable.ColorDrawable;
 import android.graphics.drawable.Drawable;
 import android.media.AudioManager;
@@ -57,6 +58,7 @@ import com.google.android.exoplayer2.util.Util;
 import com.google.android.exoplayer2.video.VideoListener;
 import com.google.android.material.bottomappbar.BottomAppBar;
 import com.google.android.material.snackbar.Snackbar;
+import com.otaliastudios.zoom.ZoomEngine;
 import com.otaliastudios.zoom.ZoomSurfaceView;
 
 import org.apache.commons.io.FilenameUtils;
@@ -69,6 +71,7 @@ import javax.inject.Named;
 
 import app.futured.hauler.DragDirection;
 import app.futured.hauler.HaulerView;
+import app.futured.hauler.LockableNestedScrollView;
 import butterknife.BindView;
 import butterknife.ButterKnife;
 import ml.docilealligator.infinityforreddit.FetchGfycatOrRedgifsVideoLinks;
@@ -147,6 +150,8 @@ public class ViewVideoActivity extends AppCompatActivity {
     TextView titleTextView;
     @BindView(R.id.download_image_view_exo_playback_control_view)
     ImageView downloadImageView;
+    @BindView(R.id.lockable_nested_scroll_view_view_video_activity)
+    LockableNestedScrollView nestedScrollView;
 
     private Uri mVideoUri;
     private SimpleExoPlayer player;
@@ -371,7 +376,27 @@ public class ViewVideoActivity extends AppCompatActivity {
 
             }
         });
+        if (mSharedPreferences.getBoolean(SharedPreferencesUtils.PINCH_TO_ZOOM_VIDEO, false)) {
+            zoomSurfaceView.getEngine().addListener(new ZoomEngine.Listener() {
+                @Override
+                public void onUpdate(@NonNull ZoomEngine zoomEngine, @NonNull Matrix matrix) {
+                    if (zoomEngine.getZoom() < 1.00001) {
+                        haulerView.setDragEnabled(true);
+                        nestedScrollView.setScrollEnabled(true);
+                    } else {
+                        haulerView.setDragEnabled(false);
+                        nestedScrollView.setScrollEnabled(false);
+                    }
+                }
 
+                @Override
+                public void onIdle(@NonNull ZoomEngine zoomEngine) {
+
+                }
+            });
+        } else {
+            zoomSurfaceView.setZoomEnabled(false);
+        }
         zoomSurfaceView.setOnClickListener(view -> {
             if (playerControlView.isVisible()) {
                 playerControlView.hide();
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/utils/SharedPreferencesUtils.java b/app/src/main/java/ml/docilealligator/infinityforreddit/utils/SharedPreferencesUtils.java
index 9cc3c839..285c8d58 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/utils/SharedPreferencesUtils.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/utils/SharedPreferencesUtils.java
@@ -194,6 +194,7 @@ public class SharedPreferencesUtils {
     public static final String LOOP_VIDEO = "loop_video";
     public static final String DEFAULT_PLAYBACK_SPEED = "default_playback_speed";
     public static final String LEGACY_AUTOPLAY_VIDEO_CONTROLLER_UI = "legacy_autoplay_video_controller_ui";
+    public static final String PINCH_TO_ZOOM_VIDEO = "pinch_to_zoom_video";
 
     public static final String DEFAULT_PREFERENCES_FILE = "ml.docilealligator.infinityforreddit_preferences";
     public static final String MAIN_PAGE_TABS_SHARED_PREFERENCES_FILE = "ml.docilealligator.infinityforreddit.main_page_tabs";
-- 
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